1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/*
* Driver for Dummy Frontend
*
* Written by Emard <emard@softhome.net>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
*
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.=
*/
#include <linux/module.h>
#include <linux/init.h>
#include "dvb_frontend.h"
static int sct = 0;
/* depending on module parameter sct deliver different infos
*/
static
struct dvb_frontend_info dvb_s_dummyfe_info = {
name: "DVB-S dummy frontend",
type: FE_QPSK,
frequency_min: 950000,
frequency_max: 2150000,
frequency_stepsize: 250, /* kHz for QPSK frontends */
frequency_tolerance: 29500,
symbol_rate_min: 1000000,
symbol_rate_max: 45000000,
/* symbol_rate_tolerance: ???,*/
notifier_delay: 50, /* 1/20 s */
caps: FE_CAN_INVERSION_AUTO |
FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 | FE_CAN_FEC_7_8 | FE_CAN_FEC_AUTO |
FE_CAN_QPSK
};
static
struct dvb_frontend_info dvb_c_dummyfe_info = {
.name = "DVB-C dummy frontend",
.type = FE_QAM,
.frequency_stepsize = 62500,
.frequency_min = 51000000,
.frequency_max = 858000000,
.symbol_rate_min = (57840000/2)/64, /* SACLK/64 == (XIN/2)/64 */
.symbol_rate_max = (57840000/2)/4, /* SACLK/4 */
#if 0
frequency_tolerance: ???,
symbol_rate_tolerance: ???, /* ppm */ /* == 8% (spec p. 5) */
notifier_delay: ?,
#endif
.caps = FE_CAN_QAM_16 | FE_CAN_QAM_32 | FE_CAN_QAM_64 |
FE_CAN_QAM_128 | FE_CAN_QAM_256 |
FE_CAN_FEC_AUTO | FE_CAN_INVERSION_AUTO |
FE_CAN_CLEAN_SETUP
};
static struct dvb_frontend_info dvb_t_dummyfe_info = {
.name = "DVB-T dummy frontend",
.type = FE_OFDM,
.frequency_min = 0,
.frequency_max = 863250000,
.frequency_stepsize = 62500,
/*.frequency_tolerance = */ /* FIXME: 12% of SR */
.symbol_rate_min = 0, /* FIXME */
.symbol_rate_max = 9360000, /* FIXME */
.symbol_rate_tolerance = 4000,
.notifier_delay = 0,
.caps = FE_CAN_FEC_1_2 | FE_CAN_FEC_2_3 | FE_CAN_FEC_3_4 |
FE_CAN_FEC_4_5 | FE_CAN_FEC_5_6 | FE_CAN_FEC_6_7 |
FE_CAN_FEC_7_8 | FE_CAN_FEC_8_9 | FE_CAN_FEC_AUTO |
FE_CAN_QAM_16 | FE_CAN_QAM_64 | FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO,
};
struct dvb_frontend_info *frontend_info(void)
{
switch(sct)
{
case 2:
return &dvb_t_dummyfe_info;
case 1:
return &dvb_c_dummyfe_info;
case 0:
default:
return &dvb_s_dummyfe_info;
}
}
static
int dvbdummyfe_ioctl (struct dvb_frontend *fe, unsigned int cmd, void *arg)
{
switch (cmd) {
case FE_GET_INFO:
memcpy (arg, frontend_info(),
sizeof(struct dvb_frontend_info));
break;
case FE_READ_STATUS:
{
fe_status_t *status = arg;
*status = FE_HAS_SIGNAL
| FE_HAS_CARRIER
| FE_HAS_VITERBI
| FE_HAS_SYNC
| FE_HAS_LOCK;
break;
}
case FE_READ_BER:
{
u32 *ber = (u32 *) arg;
*ber = 0;
break;
}
case FE_READ_SIGNAL_STRENGTH:
{
u8 signal = 0xff;
*((u16*) arg) = (signal << 8) | signal;
break;
}
case FE_READ_SNR:
{
u8 snr = 0xf0;
*(u16*) arg = (snr << 8) | snr;
break;
}
case FE_READ_UNCORRECTED_BLOCKS:
*(u32*) arg = 0;
break;
case FE_SET_FRONTEND:
break;
case FE_GET_FRONTEND:
break;
case FE_SLEEP:
return 0;
case FE_INIT:
return 0;
case FE_RESET:
return 0;
case FE_SET_TONE:
return -EOPNOTSUPP;
case FE_SET_VOLTAGE:
return 0;
default:
return -EOPNOTSUPP;
}
return 0;
}
static
int dvbdummyfe_attach (struct dvb_i2c_bus *i2c)
{
dvb_register_frontend (dvbdummyfe_ioctl, i2c, NULL, frontend_info());
return 0;
}
static
void dvbdummyfe_detach (struct dvb_i2c_bus *i2c)
{
dvb_unregister_frontend (dvbdummyfe_ioctl, i2c);
}
static
int __init init_dvbdummyfe (void)
{
return dvb_register_i2c_device (THIS_MODULE,
dvbdummyfe_attach,
dvbdummyfe_detach);
return 0;
}
static
void __exit exit_dvbdummyfe (void)
{
dvb_unregister_i2c_device (dvbdummyfe_attach);
return;
}
module_init(init_dvbdummyfe);
module_exit(exit_dvbdummyfe);
MODULE_DESCRIPTION("DVB DUMMY Frontend");
MODULE_AUTHOR("Emard");
MODULE_LICENSE("GPL");
MODULE_PARM(sct, "i");
|
